Sealing device for wells



E. N. MILLER.

SEALING DEVICE FOR WELLS. APPLICATION FILED APR 30 192}.

1,41 1,057. Patented Mai. 28, 1922.

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specification of Letters ratent. Patented Mar, 28, 1922.

Application mm so, 1921. Serial in; 405,818.

To all whom it may concern:

Be it known that I, ELIAS NEWTON MIL- mm, a citizen of the United States, and a resident of Laramie, in the county of.

Albany and State of Wyomin have in vented certain j new and usefu Improvements in Sealing Devices for Wells, of which the following is a' specification.

My invention relates to devices for sealing a water, gas or oil well between the wall of the well and thewell casing, and the purpose of my invention is the provision of a device of that charaeter which permanently seals in a simple and eflicient mannerthe well to-prevent the escape of water, oil or gas therefrom during the drilling operation. y

In carrying out my invention, I provide a perforated section of pipe which is interposed between any two sections ofthe well casing, and extending into this perforated pipe is a cement conveying tube which is connected to a source of cement supply at the top of the well for conveying the cement to a luralitv of distributin i arranged within the perforated pip e fo i' uniformly distributing the cement to a point exteriorly of the casing so that when set the cement forms a seal between the casing and Wall of the well to prevent the upward passage of water, oil or gas. Within the perforated pipe are arranged cement blocks which are .-m embracing position with respect to'the distributing pipes so that the latter are sev curely held in proper position with relation to certain openings in the perforated pipe throu h which the cement exits to a point exteriorly of the well casing. The conveying tube is detachably 21SSOC181ted ,'W1th the dlstributing pipes to permit of the removal thereof and to thus allowthe introduction of drilling tools into the well casp ing for drilling the cement blocks so that the drilling operation of the well can be continued and without danger of foreign matter assing upwardly of the well.

I, wili describe one formyof sealing de-' vice embodying my invention, and will then point out the novel features thereof in claims.

In the i aceompanying" drawings Figure 1.1! a view showing a portion pf flanges engaging the inner wall of the a well casing having applied thereto one form of sealing device embodying my invention.

Figure 2 is a vertical sectional view of Figure 3 is a transverse sectional view taken on the line 33 of Figure 2.-

Figure 4 is a detailed perspective View of the distributing pipes shown in Figure 2.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically tothe drawing, C

and C designate two sections of pipe constituting a ortion of a conventional form of well caslng, with the confronting ends of these sections exteriorly threaded to receive coupling sleeves 15 .and 15*, respectively. The seali device is arranged between the sections and C in the manner shown in Figure 2, and in its present embodirnent the sealing device comprises a perforated pipe P exteriorly threaded at lts opposite ends to engage the coupling sleeves 15 and 15 for securingthe pipe in connecting relation with respect to the sections C and C. The pipe P is provided at a point intermediate its ends .with four openings 16- which communicate at the outer and lower ends of fourl distributing PATENT OFF The conveying tube T also includes a section 19- connected to the section 18 by a coupling sleeve 20 and of such a length that its upper end is disposed at a point above the upper end of the well casing to erm1t of its connection with a force pump (not shown) by means of which cement or other plastic material is delivered to the tube.

As' shown in Figure 4, the lower ends of the distributing pipes 'D are preferably flanged asindicated at 21 to rovide a sub stantial support for the tu with the ipe P in the manner shown in 'Fi re 2. e

pipe section 18 is formed with ey's or lugs the pipe P contains cement blocks B and B arranged above and below the distributing pipes D with portions thereof extending into the perforations of the pipe P. The upper block B is formed axially there of with an openin to receive'the master distributing pipe D and the pipe section 18 and conveying tube T. The wall of this opening is formed at its upper end with vertically extending slots 23 that communicate at the lower ends with an annular groove 24. In the application of the pipe section 18 to the master distributing pi e D, the keys 22 are passed downwardy through the slots 23, and when the pipe section is properly fitt ed within the pipe D, the keys 22- repose within the groove 24. Thus when the pipe section 18 is rotated to move the keys out of registration withthe slots 23, the pipe section will be efiec tively locked within the pipe D.

In practice, the cement blocks B and B'- are applied to the perforated pipe P before the latter is associated with the well casing, and during this operation the distributing pipes D and D are also applied thus providing a unit which is readily applicable to the two sections C and C of the well casing by means of the coupling sleeves 15 and 15. Subsequent to the application of this unit to the well casing, the latter is introduced into the well whereupon the conveying tube can be extended downwardly of the well casing and the pipe section inserted in to the mas ter distributing pipe D. I By turning the conveying tube, the locking of the tube to the master distributing pipe is efiected in the manner previously described. Cement is now introduced into the conveying tube from the top of the Wall, and uiider the action of the force pump this cement is forced downwardly of the conveying tube through the master distributingpipeand into the distributing pipes- D from whence it finds exit to various points about the outer periphery of the perforated pipe P. -This operation is continued until the required amount of cement has been applied to a point between the pipe P and the wall of the wellto form a wall to effectively seal the space between the well casing and the well. The conveying tube T can now be removed to ermit the in troduction of the drilling too s, and after 'Isufiicient time has elapsed to permit of the setting of the blocksB and B and the cement exteriorly of the pipe P, the operator may dri 1 out the cement blocks so as to permit of the co'ntinuationof the drilling operation in the well and without the danger of the passage of water, oil or gas upwardly and exteriorly of the well casing.

, bodying my invention, it is to be understood that various chan es and modifications may be made herein without departing from the spirit of the invention or the spirit and scope of the appended claims.

What I claim is:

1. A sealing device for wells comprising a perforated pipe adapted to be interposed between the sections of a well casing, distributing pipes arranged within said pipe, plastic blocks within the pipe and in embracing relation with respect to the distributing plpes, and a conveying tube detachably connected to said distributing pipes.

2. A sealin device for wells comprising a pipe adapte to be interposed betweenthe pipe sections of a well casing and having openings formed therein, distributing pipes within said pipe and communicating with said openings, and a conveying tube detachably connected to the distributing pipes for conveying plastic material to and through "the'latter to a point exteriorly of said pipe.

3. Asealing device for wells comprising a perforated pipe adapted to be interposed between the pipe sections of a well casing, said pipe being formed with openings, a plurality of distributing pipes arranged within said pipe and communicating with said openings, a master distributing pipe communicating with all of the distributing pipes,

formed on the conveying tube, and cement.

and in 1 blocks within the perforated pi embracing relation to said distributin pipes, one of said blocks being formed wit slots and a groove for receiving said ke s to effect the locking of the conveying tu within the block.

5. A sealing device for wells comprising a perforated pipe section adapted to be interposed between the sections of a well casing, a filling in said pipe provided with. dis- 'a conveying tube detachably'associated with tributi'ng pasages communicating with the pipe perforations, and having a cement-conveying passage communicating with said dis-. tributing passages.

6. A sealing dev ce for wellstomprising a pipe section adapted to be interposed between the sections of a well casing, said ipe Y having a horizontal row. of lateral per orathe sections of a well casing, said member having an axial cement-conveying passage 10 in its upper portion and lateral distributing branch passages radiating from saidaxial conveying passage, and extending through the sides of the member in a horizontal row.

ELIAS NEWTONMILLER. 

